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Home >> GMC >> 2003 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 4.3L >> Diagnostic Tests >> DTC P0103: MAF Sensor Circuit - High Frequency >> Test Description

Test Description

The numbers below refer to the step numbers in the diagnostic procedures.

  1. 3 -  This step tests for Electromagnetic Interference (EMI) on the signal circuit of the MAF sensor. A frequency reading with the MAF sensor disconnected indicates an EMI related fault or a poor connection. Disconnecting the MAF sensor may set additional related DTCs.
  2. 4 -  This step eliminates any conditions which can cause a DTC to set with a normally operating MAF sensor.

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